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Finding the Fourth Proportional to 388,289.85, 582,517.94 and 219,889.77

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Solution

The fourth proportional to 388,289.85, 582,517.94 and 219,889.77 is: 329,881.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,289.85 : 582,517.94 = 219,889.77 : x
  2. Step 2: Convert to fraction form
    388,289.85/582,517.94 = 219,889.77/x
  3. Step 3: Cross multiply
    388,289.85x = 582,517.94 × 219,889.77
  4. Step 4: Simplify right side
    388,289.85x = 128,089,734,748.03
  5. Step 5: Solve for x
    x = 128,089,734,748.03/388,289.85
  6. Step 6: Final answer
    x = 329,881.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.